54 questions and answers in this section

Sports and Recreation » Nature and Adventure

Explain why the wind can extinguish a flame but fuel a fire.

Explain why the wind can extinguish a flame but fuel a fire.

A flame needs heat, fuel (like the wax of a candle), and oxygen. A slight gust of wind can abruptly cool the flame by dispersing...

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Explain why the Epupa Falls are important to the residents.

Explain why the Epupa Falls are important to the residents.

The Epupa Falls hold powerful significance for the Himba people, who have always inhabited this region. They represent a sacred place closely tied to their...

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Explain why the sea is blue?

Explain why the sea is blue?

The sun emits white light, which combines all visible colors. When this light hits water, each color reacts differently. The red, orange, and yellow wavelengths...

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Explain why do penguins swim so quickly underwater despite their clumsy appearance on land?

Explain why do penguins swim so quickly underwater despite their clumsy appearance on land?

Penguins have a streamlined torpedo-shaped body that allows them to glide easily underwater. Their wings are in the form of short, rigid flippers, perfect for...

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Explain why brisk walking is a good way to improve cardiovascular health.

Explain why brisk walking is a good way to improve cardiovascular health.

Brisk walking is a bit like a moderate workout for your heart. By practicing regularly, you directly strengthen your heart: it becomes able to pump...

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Explain why seahorses so often coil around marine objects.

Explain why seahorses so often coil around marine objects.

Seahorses have a body covered with a series of bony rings instead of soft scales. This feature gives them amazing rigidity that helps them easily...

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Explain why a tennis ball bounces higher in hot weather than in cold weather?

Explain why a tennis ball bounces higher in hot weather than in cold weather?

When you heat a tennis ball, the air inside stirs, as the air molecules move faster due to the heat. As a result, they hit...

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Explain why Japanese samurais carried katanas as their main weapon.

Explain why Japanese samurais carried katanas as their main weapon.

In Japan, starting from the Kamakura period (1185-1333), samurai adopted the katana as their main weapon due to the numerous internal conflicts and close skirmishes...

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Explain why wild animals are attracted to mountaineers' base camps during expeditions?

Explain why wild animals are attracted to mountaineers' base camps during expeditions?

Base camps often offer an exceptional abundance of accessible food. Between poorly stored food supplies, meal leftovers, and even some forgotten provisions left unattended, these...

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Explain why waves are sometimes bioluminescent blue?

Explain why waves are sometimes bioluminescent blue?

Most of the time, it is planktonic microorganisms, especially dinoflagellates, that illuminate the sea. These tiny unicellular algae, like the species Noctiluca scintillans, have the...

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